Derrick



P. KELLY.

(N0 Model.)

DERRICK.

' No. 271,474. Patented Jan.30,1883.

all/A4 Iva/Iii WITNESSES ATTORNEYS.

Brice.

PATRICK KELLY, OF POUGHKEEPSIE, NEW YORK.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 271,474, dated January30, 1883,

Application filed December 7, 1862. (No model.)

To all whom it may concern:

Be it known that 1, PATRICK KELLY, of Poughkeepsie, in the county ofDutchess and State of New York, have invented a new and usefulImprovement in Derricks, of which the following is a full, clear, andexact description.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of my improvement, partly in section. Fig.2 is a sectional plan view of the same, taken through the line mm,Fig. 1. Fig. 3 is a sectional plan view of a part of the same, takenthrough the line y y, Fig. l.

The object of this invention is to simplify the construction of derricksand promote convenience in operating them.

The invention consists essentially in the derrick-foot formed of a platehaving upon its lower side a hollow pivot and upon its upper side seatsfor the lower ends of the post and boom, whereby the said post and boomwill be securely connected and held. The derrickpost is secured to thefoot by an eyebolt secured to the said foot and fastened to the saidpost by a bolt, as will be hereinafter fully described.

A represents the base, B the post, and O the boom, of the derrick.

To the base A is attached the plate D, through which is formed anaperture, E, to serve as a socket for the pivot F, formed upon orattached to the foot G. The pivotF is made hollow for the passage of theoperating-ropes. The foot G has a socket, H, upon the rear part of itsupper side, to receive and serve as a seat for the lower end of the postB, where it is secured in place by the eyebolt I, through the eye ofwhich passes the bolt J. The bolt J also passes through the post B, andis provided with a nut, K, to fasten the eyebolt I securely to the rearside of the said post B. The eyebolt 1 passes down at the rear side ofthe post B, passes through an eye, L, in the rear end of the foot G, andhas a nut, M, screwed upon its lower end. XVith this construction thebolts I J fasten the post B to its seats H, and at the same time serveas a brace to strengthen the said post B against the pull of the weightbeing handled.

The bottom and rear side of the seat N, formed in the forward part ofthe foot G, is rounded, as shown in Fig. 1, for the rounded lower end ofthe boom 0 to rest in. The lower end of the boom 0 is hinged in its seatN by a bolt or rivet, O, passing through the said end and through thesides of its seat N, as indicated in Figs. 1 and 2.

To the upper end of the post B is attached a pivot, P, upon which isplaced the plate Q, to which the guys are attached, so that themovements of the said post will not affect the guys that hold the saidpost in a vertical position.

To the upper end of the post B is attached the end of a rope,'R, whichpasses around a pulley, S, the block T of which is connected with theouter end of the boom 0 by a band, U, and link V, or other suitablemeans. From the pulley S the rope R passes to and around a pulley, W,connected with the upper part of the post B by eyebolts X, passingthrough the said post, and in the eyes of which the journals of the saidpulley W revolve. From the pulley W the rope 1% passes down along theforward side of the post B, passes between the guide-pulley d, Fig. 3,and the post B, and passes through the hollow pivot F, and is connectedwith a drum and axle or other suitable operating mechanism. The pulley dis pivoted to eyebolts 6?, which pass through the post B. With thisconstruction, by operating the rope B the outer end of the boomU can beadjusted at any desired height.

To the outer end of the boom 0 is attached the end of a rope, Y, whichpasses around the pulley Z, the block a of which is provided with ahook, b, for the convenient attachment of the weight to be handled. Fromthe pulleyZ the rope Y passes around the guide-pulley c, pivoted in aslot in the outer end of the boom (3, and a guide-pulley, d, pivoted tothe eyebolts d From the pulley d the rope Ypasses down along the forwardside of the post B, passes through the pivot F, and is connected with adrum and axle or other suitable mechanism. With this construction, byoperating the rope Y the weight can be readily and quickly raised andlowered. The ropes R Y, after passing through the hollow pivot F, passaround guidepulleys e, pivoted to the base A, and from which the saidropes pass to the operating mechanism. The hollow pivot F is placeddirectly beneath the space between the seats H N, so that the ropes R Ycan pass in straight lines from the guide-pulleys d (1 through the saidpivot F. \Vith this construction all the mechanism will be in sight ofthe operators, so that if any part of the said mechanism gets out ofplace or out of order it can be readily seen and made right.

Having" thus described my invention, 1 claim as new and desire to secureby Letters Patent- 1. In a derrick, the foot G, made, substantially asherein shown and described, with a plate havingupon itslowerside ahollow pivot, I, and upon its upper side seats H N for the derrick postand boom, as set forth.

2. In a derrick, the combination, with the PATRlOK KELLY.

Witnesses:

J AMEs T. GRAHAM, G. SEDewioK.

